Literary usage of Mortal enemy

Below you will find example usage of this term as found in modern and/or classical literature:

1.Burnet's History of My Own Time by Gilbert Burnet (1897)"... on a secret jealousy of the earl of Murray, then esteemed the handsomest man
of Scotland, set on the marquis of Huntly, who was his mortal enemy, ..."

2.Chamber's Encyclopaedia: A Dictionary of Universal Knowledge (1891)"he said : ' I can go in peace, now that that mortal enemy of the Catholic faith
has had to die before me. ..."

3.The History of the Reign of the Emperor Charles the Fifth by William Robertson (1856)"... mortal enemy. By these arts, whatever remained of paternal tenderness was
gradually extinguished, and such passions were kindled in the breast of the ..."